fix(app-shell): the condition builder's is-empty / is-not-empty compile a null-or-empty check on a non-boolean field, and the Rules tab passes field types (objectui#11894)

fix(app-shell): the condition builder's is-empty / is-not-empty compile a null-or-empty check on a non-boolean field, and the Rules tab passes field types (objectui#11894) #6434